Steam boiler



May 11 1926. 1,584,322

J. C. PARKER STEAM BOILER Filed July 29, 1,922

TORNEYS PATENT ofFFilc E?. Y

.Tormo Palmari, or PHILADELPHiA, rENNsYLvANIA-` f STEAM IBOIILI'EIR..4

- This invention relates to steam boilers of the water tube type', and it is designed pri-v marily to provide a down-flowboiler withl a new arrangement of tubes and connections, for the purpose of improvingthe circulation by providing means for entraining the water and:` steam, facilitating evaporation, simplifyingl the vconstruction and avoiding prior structural defects. 1 a l Y This invention is characterized, in itspreferred form, by the combination, with". a steam and water drum, of a down-take connected by a' horizontal inlet box at the rear of the boiler with serially arranged tubes comprising two tubes extending forward and upward from said inlet box to respective horizontalA return junction boxes in the front y of the boiler, two tubes extendingfroml the respective junction boxes last named rearward andv downward to the topsof respective vertical junction boxes in-y the rear of the boiler, two tubes extending from thebottoms of the respective boxes last named forward and upward to horizontaljunction boxes in the front of the boiler, and so on, for any number of tubes high, to twoztubes extending rearward and downward from respective horizontal boxes in the, front of the boiler to the tops` of Yrespective vertical junction boxes of extended height in the rear of the boiler, two tubes extendingv forward and upward from the bottoms of ther boxesflast named to respective horizontal junction boxes inthe front of the boiler, and two tubesextending rearward and upward. from theboxes last named, between elongated ver tical boxes and beneath other vertical j unc-k tion boxes aforesaid Vto upcastst connected with the steam and water drum.f -V It will `be understood that this specific ar rangement, comprisingV twor double elements of` a boiler, is set out byway of illustrating ya preferred type of construction; and not by way of limitation of the invention. a

A boiler having the novel circulating sys tem specified affords an extended heating surface, produces rapid circulation, effects a highly desirable entrainment of steam and water, facilitates evaporation, prevents trap Aping the steam and water, avoidsy overheating the tubes-,secures economy in theproduction of steamV and avoids structural defects.

Desired circulating.- conditions have:v been obtained by theelongation ofthe lowermost yvertical junction boxesof each circulating Yelement so asftogive the twozreversely ex-V tending bottom tubes the necessary risei or the same number ofv tubes at the rear end where thev gases the first baflie. a

A further desideratum attainedV by the arrangement of the tubes is.` the facility provided for baffling the gases of: highest temperature and greatest expansion', to effect the most efficient heat exchange and-steam generation.

In the accompanying. drawings, Fig. l is a vertical sectional view taken longitudinally through a boiler embodying a: preferred form of my invention; Fig. Qfis a front party sectional elevation 'of the construction illustrated in F ig.y l, Fig. 3f is a rearpart sectional elev-atiorr of the construction illus:- trated in Fig. `l, and Fig.' 4@ is a` broken perspective view of two sets of, tubes de.- tached from the construction illustrated' in Fig. Il. L

The construction shown in theA drawings, by way of illustrating` a preferred form of my invention, comprises thefwalls A together with the roof B, withinxwhichrare set the steam and water drum C and the'` sets of continuous tubes D1 to- D14 which are con nected with the rear endof the'drum the downtakes DV and the upcastsD15;

Each downtakeD delivers from the drum pass upward attheiend of C toa horizontal inlet box in the rear of the boiler, from which b'ox two parallel tubes D1 extend forward and upward to respective horizontal junction boxes E1 in Athe front ofthe boiler.` From: these; junc- `tio'nsboxesE1L respective parallel tubes: D2 ex'- tendn rearwardk and downward to" the tops of the respective vertical junction.- boxes 'E2 in the rear of the boiler. Fromthe bottoms of 4these boxes E? parallel. tubes D3" extend forward and upward tohorizontal junction boxes E8 in the front of the boiler. From these boxes E3 paralleltubes'D4 extend rearward and downwardito the tops of the respective verticaljunction boxes E* inithe rear of the boiler below the' inlet boxesE. Fromfthe bottoms of the respective boxes. E4 parallel in the rear of the boiler.

tubes D5 extend forward and upward to respective horizontal junction boxes E. From the respective boxes E1s parallel tubes D6 extend rearward and downward to the tops of the respective junction boxes E6 in the rear of the boiler. From the bottoms of respective boxes EG parallel tubes D7 extend forward and upward to respective horizontal junction boxes E7 in the front of the boiler. From the respective boxes E7 parallel tubes DS extend rearward and downward to the tops of vertical junction boxes Es From the bottoms of the respective boxes E8 parallel tubes D9 extend forward and upward to horizontal junction boxes E9 in the front of the boiler. From the respective boxes E9 parallel tubes D10 extend rearward and downward to the tops of vertical junction boxes E10 in the rear of the boiler. From the bottom of respective boxes E10 parallel tubes D11 extend forward and upward to hrorizontal junction boxes E11 in the front of the boiler.

From the respective boxes E11 parallel tubes D12 extend rearward and downward to the tops of junctionfboxes E12 of approximately double the depth of the previously specified vertical boxes occupying higher positions.

I boxes E13 parallel tubes D11 extend rearward and upward to angle'boxes E1l1 connecting them with the upcasts D15, the tubes D1A1 thus extending through open spaces beneath boxes vE1o and above the bottoms of the elongatedy boxes E12.A

The tubes D2` have the baliie F disposed thereon so as extend from their rear ends .forward say two-thirds of their length and the tubes' D11 have the baffle F1 disposed thereon so as to extend ,from their forward ends rearward say two-thirds of their lengths. The upiiow tubes D13 and D14 are in the primary combustion chamber Gr, subject to the hottest condition of the gases, which flow from thefprimary combustion chamber through the passage between baflies F1 and F in contact with the tubes therein and thence into contact with lhe drum C.

It will now be seen that this arrangement provides an extended course for circulating Water back and forth through the heating zones with correspondingly extended heating surfaces. The general downward flow of the water is modified so thatit vis required to entrain the steam.' 'Ihe steam or steam and water are `caused to flow upward through the bottom tubes and the tubes connecting them with theupcasts, with resulting avoidance of trapping, inducement ofvrapid circulation, prevention of overheated tubes, and provision vfor better heating. i

Having described my invention, I claim:

l. In a downflow steam boiler, a water circulating and steam generating element having a set of serially arranged tubes disposed in vertical rows and comprising oppositely inclined bottom tubes, each forming the lowermost tube of a vertical row.

2; In a downtiow steam boiler, the combination with a steam and water drum, of a water circulating and steam generating element having a set of serially arranged tubes forming'a plurality of vertical rows and comprising opposite-ly inclined bottom tubes each forming the lowermost tube of a vertical row, a down-flow tube connecting said drum with an upper tube of said element, and an up-flow tube connecting said drum with the higher end of one of'said bottom tubes.

3. In a steam boiler, a water circulating and steam generating element having a set of seriallyarranged tubes disposed in vertical rows and comprising upper tubes which are similarly disposed `and through which flow is alternately upward and downward and bottom tubes which' are reverselyrdisposed and through both of which flow is upward. Y

4c. In a steam boiler, the combination with a steam and water drum, of a water circulating and steam generating element having a set of serially arranged tubes disposed in vertical rows and comprising similarly disposed upper tubes through which the flow is alternately upward and downward and oppositely inclined bottom tubes in which the flow is upward, a downflow passage connecting said drum with an upper tube of said element and an uptlow passage connecting said drum with the higher end of the last lower tube.

5. Ina steamk boiler, the combination with a steam and waterdrum, of a downtake, a junction box connected with said downtake, a plurality of steam generating and water circulating elements connected2 with said junction box, and upcasts` through which the respective elements discharge to said drum, each of said Velementscompr'ising a set of tubesoonnected in series by vertical junction boxes at one end thereof and horizontal junction boxes at the other end thereof, the two' vlowermost ktubes of the series being connected and inclined in opposite directions, so as'to secureupward flow therethrough to said upcast.

6. In a steam boiler, the combination with a steam and water drum, of a plurality of water circulating and steam generating elements each having a set of tubes and junction boxes arranged in series with the upper tubes similarly inclined and the bottom tubes oppositely inclined and'conduits connecting said elements in circuit withsaid drum, each of said elements having'tubes thereof connected at one end by horizontal junction ating element having serially arranged tubes boxes and at the other end by vertical junodisposed in a plurality of vertical rows, the 10 tion boxes, the lowerrnost of which is relbottom tubes of the respective rows being atively elongated, whereby the last tube of inclined oppositely to one another. 5 the series passes above the connection with In testimony whereof I have hereunto set aid elongted box of the oppositely inclined my name this 28th day of July, 1922.

ottoni tu e.

7 A downlow boiler comprising a gener- JOHN C. PARKER. 

